U.S. stocks fell the most since June on concerns over the timing of Fed tapering.

U.S. stocks fell the most since June, after two Federal Reserve officials indicated the central bank could begin reducing its easy-money program as soon as next month.

The Dow Jones Industrial Average dropped 93.39 points, or 0.6%, to 15518.74, its biggest point and percentage decline since June 28. International Business Machines led declines by 24 out of 30 blue-chip components after Credit Suisse downgraded IBM to underperform....